John drummond



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NAPETERS, PHOTO-LITHOGRAPHER WASHINGTDN D C NTED STATES VPAllEll'l OFFICE.,

JOHN DRUMMOND, OF NEW YORK, N. Y.

MACHINERY FOR MAKING BULLETS.

Specification of Letters Patent No. 5,563, dated May 9, 1848.

To all whom t may concern Be it known that I, JOHN DRUMMOND, of the city, county, and State of New York, have invented a new and useful Improvement in the Method of Making Bullets and other Round Shot of Lead, and that the following is a full, clear, and exact description of the principl'e or character whichdistinguishes it from all other things before known and of the manner of making, const-ructing, and using the same, reference being had to t-he accompanying drawings, making part of this specification, in which- Figure 1 is a plan of the machine; Fig. 2, a side elevation; and Fig. 3, a longitudinal vertical section taken at the line (X X) of Fig. l; and Fig. 4 gives a perspective representation of the bar of lead prepared for forming the bullets together with one bullet formed.

The same letters indicate like parts in all the gures.

The nature of the first part of my invention consists in making bullets from flat plates of lead cast, rolled, hammered, or otherwise formed of a thickness less and of a width greater than the intended diameter of the bullets to be formed, when this is to be combined with the process of making such bullets by cutting the lead for each bullet by a punch and die from the width of the bar by means of which combined process or mode of procedure the bullets are cut olf and formed without leaving scraps of lead in the operation of cutting as heretofore, thus saving the labor required in recasting the scraps and forming them into a bar. And the second part of my invention relates to the machine for cut-ting off the pieces from the bar and forming the bullets, and consists in using a punch the end of which is formed with a semi-spherical cavity, combined with a die having a cylindrical cavity for the punch to move in, the bottom of which is in the form of a semi-spherical cavity with a small hole in the center thereof to which is adapted a sliding follower one end of which constitutes a portion of the semi-spherical cavity of the die; the said follower being so connected wit-h the punch that when it (the punch) is drawn back it shall carry the follower with it suiiciently far to discharge the formed bullet and then permit the punch to move back independently of the follower to leave the required distance between them to receive the bar of lead which is of greater width than the diameter of the bullet when formed.

In accompanying drawings (a) represents the bar of lead from which the bullets are to be cut, and (b) a bullet completely formed, from which it will be seen that the bar is made in thickness about one half of the diameter of the bullet and this deficiency is made up by the width of the bar which is double the diameter of the bullet. By this reducing of the thickness of the bar of lead and making up the deficiency by increasing the width, the piece of lead for forming each bullet is cut off by the punch and forced into the die without leaving scraps, which would not be the case if the bar was made in the thickness equal to the diameter of the punch 11: the bullet to be formed, as will be seen by The bed (c) of the machine is made of any desired form adapted to the intended purpose; it is provided with two standards or puppets in wh'ich works a main shaft (cl) driven by any first mover, and this shaft carries a cam (c) which acts on the punch carrier (f) that is hollowed out as at (g) to embrace the cam, so that by the rotation of the shaft the lcam moves the punch carrier back and forth in its slides (71 h). The punch (i) attached to the forward end of the punch carrier is made of steel, cylindrical, with the end hollowed out in the form of a semi-sphere. The cylindrical part of the punch lits in a die attached to the bed which has a cylindrical cavity to receive the punch, the bottom of which cavity is semi-spherical so that when the punch is forced in the semi-spherical concavities in the end of the punch and at the bottom of the die will form a spherical matrix of the size of the intended ball. The bottom of the die is pierced with a hole in which is fitted a follower (Z) the end of which when carried back forms a part of the semi-spherical cavity of the die; and this follower is acted upon by a bridle (m) which is attached to the forward part of the punch carrier, and is bent at right angles, the bent part which on the return of the punch carrier strikes against the rear end of the follower and forces the ball out; and when the lead is being cut by the direct motion of the punch and the lead is forced in the die the follower is forced back into its cavity by the lead.

The bar of lead (a) is fed into the machine by the rotation of two feed rollersY (p p) that are made to move with equal velocity by the two spur wheels (g g), and on the arbor of one of them there is a ratchet wheel (7') the teeth of'which are acted upon by a hand not seen in the drawing but attached in the usual manner to an arm (t) that is connected byl a joint link with a lever (u) and carried down at each rotation of the main shaft by a cam This operation forces the bar of lead forward the distance required at each operation to present Y the required length of lead to the die which is cut off by the punch and carried into the die and there upset and compressed into the spherical form required. And on the return of the punch discharged from the die by the follower, and then separated from the end of the punch by a slide (a) jointedto a lever (b) the arm (c) of which is acted on at each revolution by an arm (d) on the shaft.

It will be obvious from the foregoing that the various movements of the punch, folscribed of forming bullets by cutting at each operation a piece across the width of a' bar of lead made thinner and wider than the Vdiameter of the intended bullet that the punch in the operation of cutting may force the said piece of lead into the die described and there swage it into the required form, and thus avoid leaving remnants, as described.

y JOHN DRUMMOND.

Vitnesses:

ALLAN M. SNIFr-EN, WM. SHALER. 

